Star Sightings: Beyonce and JAY-Z Take Kentucky, Jessica Alba Rings in Her Birthday Cinco de Mayo Style & More

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BEYONCE JAY-Z ON THE RUN TOUR 2014
Myrna Suarez/WireImage for Parkwood Entertainment

The Kentucky Derby is more than just fast horses and fancy, fabulous hats -- it's also a great place to people watch! 

Beyonce, JAY-Z and their kids -- 6-year-old daughter Blue Ivy and 10-month-old twins Rumi and Sir -- watched the Kentucky Derby from the ultra-exclusive "The Mansion" section above Millionaire’s Row at Churchill Downs in Louisville on May 5. 

Taylor Kitsch was on hand to help Ram Trucks rev up for its ninth year as the Official Truck of Churchill Downs and the Kentucky Derby.

Taylor Kitsch at Kentucky Derby
Daniel Boczarski/Ram

With wife Cassandra Jean by his side, Stephen Amell got surprised during Kentucky Derby weekend with an early birthday cake during the 8th Annual Fillies & Stallions Party, hosted by Patron and Black Rock Thoroughbreds, at Mellwood Arts & Entertainment Center. The Arrow star officially turned 37 on May 8.

Stephen Amell and wife at Kentucky Derby
Dia Dipasupil/Getty Images

Amell wasn't the only one celebrating a birthday. Rapper Desiigner rang in his 21st with a release party for his EP, L.O.D., at Up&Down NYC on May 3.

Desiigner turns 21
Johnny Nunez/Getty Images

Meek Mill turned 31 alongside friends at David Grutman’s Komodo restaurant in Miami, taking over the entire first floor and toasting with Perrier Jouet Champagne and Tequila Avion Reserva 44 shots.

Meek Mill turns 31
World Red Eye

Blindspot actress Jaimie Alexander celebrated a friend’s birthday at Lucky Strike in Philadelphia on May 5, spending a few hours bowling and enjoying bites like margarita pizzas, chicken bites, chips and guacamole, and Brussels sprouts.

Jessica Alba looked pretty in a yellow floral dress and sunrise tassel earrings by Flaca Jewelry while celebrating her recent birthday (she turned 37 on April 28) with a Cinco de Mayo weekend celebration.

Whitney Port celebrated Cinco de Mayo a little early, making an original margarita with Cointreau to get in the spirit of the holiday.

Whitney Port makes a margarita
Christopher Fragapane for Cointreau

On the party scene, Vanderpump Rules stars Tom Sandoval and Tom Schwartz took in the scene in Sandoval’s home turf of St. Louis, Missouri, hitting up Crown Room in Ballpark Village on May 5.

Vanderpump Rules stars Tom Sandoval and Tom Schwartz in St Louis
Alex Schenberg

Ty Dolla $ign and Lauren Jauregui were seen dining at TAO LA before heading up to the Highlight Room atop the Dream Hollywood Hotel to kick off the "Superficial Summer Series” on May 3. Across the alley at Beauty & Essex, Johnny Manziel helped his wife, Bre Tiesi, celebrate her birthday before the two headed up to the roof.

On May 6, Ludacris closed out the weekend at LIT Sundays at Daylight Beachclub at Mandalay Bay Resort & Casino in Las Vegas with an epic performance of his classic hits, including “What’s Your Fantasy” “How Low” and “Saturday.”

Ludacris at Daylight
Daylight

Also in Sin City, Gordon Ramsey met up with Marshmello after the DJ's set at Encore Beach Club's Nightswim season grand opening party on May 10, sharing a pic to Instagram afterward. "I thought marshmellos were for dessert....great set last night @marshmellomusic Gx #vegas," the celebrity chef wrote.


Emmy Rossum took in Spotify's exhibit celebrating the life of David Bowie at the Brooklyn Museum on May 7.

Emmy Rossum at david bowie exhibit in brooklyn
Marko Krunic

Charlotte McKinney left her mark on COVERGIRL’s “I Am What I Make Up” cocktail party at the Sunset House in Los Angeles on May 8.

Charlotte McKinney at Covergirl party
John Sciulli/Getty Images for COVERGIRL

Hidden Figures star Aldis Hodge created a custom impression for the national launch of Bulleit Frontier Works: Bottle Impressions live at the brand’s whiskey lounge at Frieze New York.

Plus, Alicia Reiner and Geena Davis were dressed to the nines at the 4th Annual Bentonville Film Festival Awards in Bentonville, Arkansas, on May 5. Davis is one of the festival's co-founders.

Alicia Reiner and Geena Davis at Bentonville Film Festival
Phillip Faraone/Getty Images for Bentonville Film Festival

Tori Kelly was a ray of sunshine at Project Sunshine's 15th Annual Gala at Cipriani 42nd Street in New York City on May 3, where she performed an acoustic version of “Don't You Worry 'Bout a Thing” for guests at the event, which raised more over $1 million for the non-profit’s efforts in creative expression, socialization and learning for children.

Tori Kelly at project sunshine gala
Steve Eichner/Getty Images

Also giving back, Goo Goo Dolls frontman John Rzeznik and Heart’s Nancy Wilson performed their hits during Orange County Music & Dance's charity concert. The event benefited the non-profit community performing arts school, a place that allows underserved youth musicians to experience performing with rock stars and world-famous classical musicians.

John Rzeznik and Nancy Wilson
OC Music & Dance

And Debra Messing took part in National Teacher Appreciation Day on May 8, helping Crayola launch its “Thank a Teacher” initiative by giving a heartfelt tribute to her high school drama teacher, Jim Metcalfe, whom she said was “the first person who wasn’t my mother that validated my dream.”

debra messing and teacher
Eugene Gologursky/Getty Images

Over in New York City, Denise Albert and Melissa Gerstein, aka The Moms, helped Mayim Bialik celebrate her new book, Boying Up: How to Be Bold, Brave, and Brilliant, at a Mamarazzi event hosted with Invisalign and Poise at Brookfield Place on May 7.

Mayim bialik mamarazzi event
Jonathan Breton

The Big Bang Theory star wasn't the only author excited about her new reads! Celebrity chef Michael Symon hosted a luncheon featuring dishes from his cookbook, Playing With Fire, to celebrate the one-year anniversary of his newest restaurant, Angeline, at Borgata Hotel Casino & Spa in Atlantic City.

Michael Symon in AC
BPR

Zooey Deschanel also had meals on the brain, hitting the stage during the Los Angeles Times Food Bowl: Power of Food on May 1, where Chef Jose Andres joined guests for a conversation about the power of food in conjunction with L.A. Kitchen.

Zooey Deschanel at LA food event
Jennifer Johnson

Molly Sims had plenty to say over in NYC! She looked pretty in purple at the first Create & Cultivate Beauty Summit on May 5. Sims was the keynote speaker at the event, which featured Mary Kay.

Molly Sims at create&cultivate
Beck Smith of Smith House Photo

Not only are celebs eating out and partying, but they're staying fit, too! Kourtney Kardashian and her BFF, Larsa Pippen, crushed their workout at CruBox in West Hollywood on May 7. The duo, as well as Kardashian’s sister, Kim, were filming an upcoming episode of Keeping Up With the Kardashians at the boxing studio.

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i wish you would 🥊

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Then there were stars combining healthy habits and a little bit of fun. Real Housewives of Beverly HillsTeddi Mellencamp, Rachel Taylor and Who What Wear founder Hillary Kerr were among the ladies celebrating holistic nutritionist and celebrity health coach Kelly LeVeque’s new partnership with Montage Hotels & Resorts during a luncheon that included Be Well By Kelly smoothies and Casamigos Reposado tequila margaritas on May 2.

Let's not forget that Mother's Day is coming up! Love & Hip Hop: New York star Erica Mena showed off the box of flowers and treats from Bouquet Bar that she planned on sending to her mom.

Erica Mena with flowers
Frankie Anderson

Meanwhile, designer Pol’ Atteu and his partner, Patrik Simpson, filmed an episode for the second season of Amazon Prime’s Gown and Out series in Beverly Hills with reality TV personality and artist Sham Ibrahim.

atteu
Tatsu Ikeda

For even more must-see star sightings, click through the gallery below.

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